Bug 56803 - [Ubuntu 12.04.1 LTS 32-bit] Several SiS 661GX / 761GX (Real256E graphics) issues
Summary: [Ubuntu 12.04.1 LTS 32-bit] Several SiS 661GX / 761GX (Real256E graphics) issues
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/SiS (show other bugs)
Version: unspecified
Hardware: x86 (IA32) Linux (All)
: high major
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
URL: https://bugs.launchpad.net/xserver-xo...
Depends on:
Reported: 2012-11-06 11:38 UTC by mypersonalmailbox1
Modified: 2018-08-10 20:47 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

kern.log (173.71 KB, text/plain)
2012-11-06 12:48 UTC, mypersonalmailbox1
no flags Details
dmesg.txt (37.63 KB, text/plain)
2012-11-06 12:50 UTC, mypersonalmailbox1
no flags Details
lspci.txt (6.94 KB, text/plain)
2012-11-06 12:51 UTC, mypersonalmailbox1
no flags Details
Xorg.0.log (40.78 KB, text/plain)
2012-11-06 12:51 UTC, mypersonalmailbox1
no flags Details
Xorg.0.log.old.txt (41.69 KB, text/plain)
2012-11-06 12:52 UTC, mypersonalmailbox1
no flags Details

Description mypersonalmailbox1 2012-11-06 11:38:46 UTC

I will like to report that SiS 661GX's integrated graphics (Real256E graphics) has number of issues (bugs) under Ubuntu 12.04 LTS 32-bit.
1) Ubuntu logo doesn't get displayed until the last moment, and it is at a low screen resolution

In a typical system, during boot, Ubuntu displays its graphical logo with red dots flashing on the screen.
In a SiS 661GX-based system, the screen will have a dark purple background pretty much throughout the boot up, and Ubuntu graphical logo will not get displayed until just right before the login screen gets displayed.
2) The graphics starts out in interlaced mode if I use Gateway EV700 CRT monitor with it

I often use this computer (see System Configuration 1) with Gateway EV700 CRT monitor.
Unfortunately, Ubuntu will choose interlaced mode for the screen (87 Hz Interlaced).
Since Ubuntu 12.04 doesn't have a direct way to alter the screen refresh rate from its control panel like menu, the screen quality will be quite poor.
Since the monitor itself it capable of 1024 X 768 @ 75 Hz Non-Interlaced, shouldn't this behavior (starting out in interlaced mode) be considered a bug?

3) Mouse cursor disappears if there is rendering happening underneath it
I don't know if the SiS x.org display device driver uses hardware cursor feature of SiS graphics (I am assuming that SiS graphics supports hardware cursor.), but I notice that it disappears when there is some rendering happening underneath it.
Particularly noticable in Firefox.
I didn't observe this with NVIDIA or ATI Technologies graphics so I assume this is a bug.
4) Screen horizontal and/or vertical frequency goes nuts during restart or shut down
When I try to restart or shut down this computer, the monitor's horizontal and/or vertical frequency goes out of range.
I don't know which one goes out of range, and I have no way of knowing this.
I will say that this is potentially dangerous since it can damage a monitor, although if I am correct, most monitors have ways to detect this kind of condition, and will display a warning message to prevent damage to the monitor.
Regardless, it is not a desirable condition, and I believe this should be considered a bug.
Overall, these issues mentioned here didn't exist in Ubuntu 10.04 LTS 32-bit.
All of them appeared in Ubuntu 12.04 LTS 32-bit.
        Regarding this SiS Real256E integrated graphics, I have another mainboard called ECS 761GX-M754 (SiS 761GX/964 chipset).
The integrated graphics inside SiS 761GX is identical to SiS 661GX.
SiS 761GX also exhibits issues similar to what was described here.
System Configuration 1:

- Intel Pentium 4 2.8 GHz
   * 800 MHz FSB
    * 130 nm device (Northwood)
    * Hyperthreading enabled
- ASUS P4S8X-MX mainboard
    * SiS 661GX northbridge
    * SiS 964 southbridge
    * BIOS Revision 0808 (last release)
- SiS Real256E integrated graphics
   * Using 16MB for graphics
- Hitachi IC35L060AVV207-0 60GB PATA hard drive
- Hitachi-LG Data Storage GCC-4481B PATA CD-RW/DVD-ROM drive
- USB multi-card reader
- USB keyboard
- USB mouse
- Gateway EV700 CRT monitor

System Configuration 2:

- AMD Sempron 2800+
- ECS 761GX-M754 mainboard
  * SiS 761GX Northbridge
  * SiS 964 Southbridge
  * BIOS Version 070227
- SiS Real256E integrated graphics
   * Using 32 MB for graphics
- Emprex 1008IM PATA DVD-RW drive
- USB multi-card reader
- PS/2 keyboard
- PS/2 mouse
- Gateway EV700 CRT monitor
Comment 1 mypersonalmailbox1 2012-11-06 12:48:31 UTC
Created attachment 69618 [details]
Comment 2 mypersonalmailbox1 2012-11-06 12:50:28 UTC
Created attachment 69619 [details]
Comment 3 mypersonalmailbox1 2012-11-06 12:51:17 UTC
Created attachment 69620 [details]
Comment 4 mypersonalmailbox1 2012-11-06 12:51:41 UTC
Created attachment 69621 [details]
Comment 5 mypersonalmailbox1 2012-11-06 12:52:01 UTC
Created attachment 69622 [details]
Comment 6 mypersonalmailbox1 2012-11-06 12:52:59 UTC

I uploaded relevant log files to analyze this bug.


Comment 7 mypersonalmailbox1 2012-11-17 07:22:58 UTC

Did Thomas Winischhofer stopped maintaining the SiS x.org device driver?
If so, is there anyone actively maintaining SiS x.org device driver currently?


Comment 8 GitLab Migration User 2018-08-10 20:47:41 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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